<!DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        // 1.
        // for (let i = 1; i <= 100; i++) {
        //     document.write('月薪过万<br>')
        // }

        // 2.
        let sum = 0
        for (let i = 1; i <= 100; i++) {
            if (i % 2 === 0) {
                sum += i

            }
        }
        document.write(sum)
    </script>
</body>

</html>